负压抽吸式喷气涡流纺喷嘴气流场的数值模拟  

Numerical simulation of airflow field in air jet vortex spinning nozzle with negative pressure suction

作　　者：朱江阳 奚传智 裴泽光[1,2] ZHU Jiangyang;XI Chuanzhi;PEI Zeguang(Donghua University,Shanghai,201620,China;Shanghai Frontiers Science Center of Advanced Textiles,Shanghai,201620,China)

机构地区：[1]东华大学,上海201620 [2]上海市现代纺织前沿科学研究基地,上海201620

出　　处：《棉纺织技术》2023年第7期26-31,共6页Cotton Textile Technology

基　　金：国家自然科学基金项目(11972116);上海市现代纺织前沿科学研究基地资助项目(X11012201-011);上海市自然科学基金资助项目(23ZR1401600);中央高校基本科研业务费专项资金资助项目(2232023Y-01)

摘　　要：为了研究负压抽吸式喷气涡流纺喷嘴内的气流场,采用Realizable k-ε模型模拟喷嘴内气流的湍流运动,利用计算流体动力学仿真软件ANSYS Fluent对所建立的负压抽吸式喷气涡流纺喷嘴气流场计算模型进行了数值求解,获得了喷嘴中的气流流动特征。模拟结果表明:空气从气室经由喷射孔加速射入涡流管内,随后在其中做旋转运动,继而进入涡流管与锭子头端之间环形区域;沿纤维导引通道进入涡流管的部分气流受到锭子内部抽吸孔中负压抽吸气流的作用而流入锭子内的引纱通道;在锭子入口附近,引纱通道内气流形成较为明显的旋转运动;随着位置向下游方向移动,引纱通道内气流的旋转运动逐步减弱并消失,气流通过抽吸孔沿径向流入锭子与负压抽吸管之间的腔体内,并在其中形成了分布较为均匀的6个涡。该研究方法与结果可为低落纤喷气涡流纺纱喷嘴的设计提供理论支撑。In order to study the airflow field in air jet vortex spinning nozzle with negative pressure suction,the Realizable k-εmodel was used to simulate the turbulence of airflow.The CFD software ANSYS Fluent was used for numerical solution of airflow field numerical model of the obtained negative pressure suction type air jet vortex spinning nozzle.Airflow characteristics in the nozzle was obtained.The simulation results showed that the air was accelerated into the vortex tube through the injectors from the air reservoir.The airflow was then whirled in the vortex tube and subsequently entered the annular region between the vortex tube and the spindle tip.Partial airstream from the fiber guiding entrance entering the vortex tube flowed into the yarn guidance channel inside the spindle under the action of the negative pressure of air suction.In the vicinity of the spindle entrance,the airflow in the yarn guidance channel showed an obvious swirling motion.As the position moving to the downstream,the swirling motion of airflow in the yarn guidance channel was gradually weakened and disappeared.The airflow entered the cavity between the spindle and the air suction tube through the air suction holes.Six uniformly distributed vortices were formed inside.The methods and results in this paper could provide theoretical support for the design of air jet vortex spinning nozzle with low fiber loss.

关 键 词：喷气涡流纺 喷嘴 负压抽吸 气流 数值模拟 

分 类 号：TS112.8[轻工技术与工程—纺织材料与纺织品设计]